Type writing machine



2 sheets-sheet 1. A. W. CASH.

TYPE WRITING MACHINE.

'Patented Nov. 1, 1887.

(No Model!) ...-'mmnunm ETERS Pnem-Lmwgnpner. wzmngmn. D. C.

(No Model.)

, 2 Sheets- Sheet 2. A. W. CASH. TYPE WRITING MACHINE.

Patented Nov. 1, 1887.

Mw uu CWA RS. Phow-umagnnber, wmungim. u, C.

TINTTED STATES PATENT Critica,

ARTHUR W'. CASH, OF HARTFORD, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE TYPOGRAPH COMPANY, OF SAME PLACE.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent Nc. 372,516, dated November l, 1387.

(No model.)

To aZZ whom, t may concern:

Be it known that I, ARTHUR W. CASH, of Hartford, in the county of Hartford and State ofConnectieut,have invented a certain new and useful Improvement in Type XVriting Machines, of which the following is a description, reference being had to the accompanying drawings, wherein- Figure l is a plan view of a type-writer embodying my improvements. It shows only three of the key-levers and type-levers, and the central part of the platen is represented as broken away. Fig. 2 is practically a View in vertical central section on the plane denoted by the broken line a: x, with some parts represented as broken away and some parts as absent, this for the purpose of making location and arrangement of other parts clear. Fig. 3 is a detail view from substantially' the 2e point A, Fig. l, of the base-piece, in which are pivoted the lower ends of the levers, to the upper ends in which the type-bars are pivoted, the side B being the base thereof. Fig. i is a detail side view of the clamping arrangement by which the paper is clamped to the platen. Fig. 5 is a rear elevation view of the machine, meaning by rear77 the side opposite the operator. In this view the platen is shown in vertical cross-section. Fig. 6 is, in substance, a view in central vertical longitudinal section on the plane denoted by the dotted line x x, showing only the parts which are below the surface of the platen. Fig. 7 is a top or plan view of the platen-carriage and appurtenances.Y Fig. 8 is a detail plan view o1' the device which propels the platen laterally when the printing is going on. Fig. 9 is a side detail View of the detent device. Fig. l0 is a rear elevation view of the detent de- 4o vice. Fig. l1 is a detail view showing the mode of attaching the types to the type-bars, the types being in section, scale enlarged.

The letters c b denote the platen as a whole. c denotes the platen-frame, and b denotes a i5 diaphragm, of enameled leather or other suitable material, stretched upon this platenfraine, and serving as a table or surface on which lies the sheet of paper to be printed upon.

5o c denotes what I will term the platen-rod,

running from end to end of the platen-'frame and through the sleeved, which thereby serves as a guide-block for the longitudinal reciprocation of the platen. The platen has, also, side supports, e. Sleeve d, united to support e, forms a platen-carriage.

In the within description and aceoinpniying drawings a platen or movable table having a flat surface is shown and described as a paper-support; but I do not limit myself to 6o the speciiic construction thus shown. A rateh,

c, is formed on the under side of the platenrod c, and is a part of the arrangement for giving the platen its step-by-step longitudinal movement. 6 5

The letter f denotes the line-spacing lever with its outer and longer end held up to normal position by spring g. This lever f bears at its rearward end the spring-pawl h, held upward to a normal position by a spring, The 7o spring Ir/ holds the pawl L normally out of engagement with the rateh c. The spring-pawl Ii co-operates with the ratch c', when the forward end of the lever f is pressed down, with the effect of pushing the platen rearward a 73 single line-space by a single depression ofthe line-spacing lever. Obviously, the platen can at any time be pulled forward any desired distance within the limits of the longitudinal motion that the device has when the lever is So not depressed to cause the engagement of the pawl h with the ratchet c. The platen-carriage moves back and forth laterally on the lateral guide-rods j, being provided for that purpose with sleeves k, which take hold of these guide-rods. The springZ propels the platen laterally when the printing is going on. From this spring Z runs a cord, my, upon and around the cam n, which is made cam-shaped for the purpose of equalizing the propelling 9c power of the spring at the different parts of the lateral travel of the platen. This cam 'n is practically one with the pulley o, which is larger than the cam just mentioned, and to its periphery is attached a cord, p, which runs to (a projection from) the platen-carriage. (See Figs. 5 and 8.) This arrangement of spring, cord, cam, pulley, and cord constitutes, as already indicated, the force and device for propelling the platen laterally when printing reo is going on. As this lateral motion when the printing 1s going on is necessarily a step-bystep movement, I interpose a detent device to effect that end, which I will now describe.

The letter r denotes a device which I will term the detent-lever, pivotally hung at pivots s, extending forward and there broadened into the pad r', which underlies all the keys, so that when any key is depressed the front end of the detent-lever is depressed, both the pad and key being returned to place vertically by the spring t. The rearward part of this detentlever bears the escapement device, made up of the liXed pawl a and the pivoted spring-pawl o. (See lEigs. 5,9, and 10.) Then the parts are in the normal position of rest, the pivoted spring-pawl a is engaged with the lateral ratch w, appartenant lo the platen. When the front end ofthe dctent-lever is depressed, the spring-pawl t is swung rearward out of engagement with the' ratch last mentioned,l

and the fixed pawl u is swung into its place and into engagement with that ratch, in both cases, such engagement preventing` the springl from actuating theplaten. As the spring-pawl n is thus disengaged from the ratch w, and the fixed pawl u is thrown into engagement therewith, the spring a throws the top of the springpawlv one step to the left. Now, on permitting the forward end of the detent-lever to rise, the

fixed pawl 4just referred to is swung forward out of engagement with the ratch w, and the spring-pawl o is thrown into engagement with the next tooth, when the spring Z (being stronger than the spring (d) immediately pulls the platen one step laterally and into the position for permitting the paper to receive the imprint of the next letter. When in the progress of this step-by-step lateral feed of the platen the end of a line has been reached, and

it is desired to move the platen laterally-the length of a line or less backward,`itis attained by means as follows: The ratch w is pivoted, by arms at the ends, on the pivots b', andkept down normally by springf, so that the'ratchr can be raised and lowered somewhat. The letter e denotes a cranked lever, co-operating at one end with the rateh w and to its other end there is aflixcd a pull-wire extending to the finger-lever g', by the operation of which the lateral ratch w is lifted out of contact with the pawls last referred to, so that the operator can readily move the platen and its carriage laterally, he, for this purpose, utilizing the line-spacing lever f, and pulling sidewise upon it.

The surface of theplaten has been'described as practically a fiexible diaphragm. Y Underneath it and borne on top of the sleeve d is a su pporting-bar, 7L', which I will call a platenbar," which is underneath the line where the printing is being done, and supports the said diaphragm and the paper upon it firmly on that line, as obviously is necessary to receive 5 the impact of' the types.

Each type, z", is borne on the end of a typethe inking-pad.

bar, j. Each type-bar is jointed or pivoted at the opposite end to a bent lever, k', which is pivoted at the Aangle or bend in the pivotbaseZ, and at its forward end is -jointed or pivoted toakey-lever, m', through the medium of alink, a. Intermediate of its two ends each type-bar is jointed or pivoted to a walkingbar, o', which walking-bar is also pivoted in the pivot-base. Each of the types i has a. cylindrical socket in the end opposite the printing-face, as shown in Fig. 1l, and into this socket is tightly fitted a corresponding tenon on the end ofthe type-bar. This mode of attachment allows the type to be adjusted with reference to the plane of motion of thetype-bar, so that it will print upright when it strikes the paper, and it also allows of thek ready attachment to and removal of the types from the type-bars. In the normal position of :rest the front ends of the key-levers are kept raised by the spring t under the pad r', as already mentioned, and in thisfnormal Aposition of rest the types rest on the inking-pad p. Vhen a key-lever is depressed, its corresponding type starts from the inking-pad and travelsby a path approaching elliptical in its direction, and strikes squarely upon the paper which is upon the platen,'leaves its imprint, and the key-lever, being released, returns to The printing-point is of course the same for all the-types, being the point directly in front of the pointer s. The pivot-base Z is preferably all in one piece, and contains pivot-grooves t', which receive the pivot-rods a. 4'which are held to place by the clamps c. Each of the clamps r consists of a plate having its ends bent down, so as to fit into the groove upon the wire, where it is held vin place by a screw passed into the base e.

The paper is clamped upon the platen by means of the clamp w', pressed to contact with the platen `by spring a. This clamp being an angular strip of metal lying along the edge of the platen with one flange adapted to grasp the paper and having inclined slots b through the other, thepins c, that are fast to the platenframe and pass through the slots,'serving as guides to control the motion of the clamp when the lever d, which is connected to the clamp by means of the link e, is depressed.

As is readily obvious, the types are arranged in a horizontal semicircle and the iuking-pad is in a horizontal semicircle.

I'claim as my improvement- 1. In a type-writer, in combination, the supporting bed or frame, the platen-carriage movablelaterally across the frame,the platen borne on the platen-carriage and movable along it yacross the line of movement of the carriage,

the ratch c', fast to the platen, the platen-feed lever f, bearing the spring-pawl h, adaptedto engage the teeth of the ratch, and the spring g, whereby the pawl h is held normally outof engagement with the ratch, all substantially as described.

, 2. In combination, the platen, the spring- ICO IIO

clamp w', the lever cl, and the link e, substantiall y as described, and for the purpose set forth.

3. In a type-writing machine, in combination with a laterally-movable platen-carriage, the ratcll w. pivoted thereto, the detent-lever o', having the pad o", and bearing the escapeinent with its teeth [5o-operating with those on the ratch-bar in limiting the movement ofthe platen-carriage, the bent lever e', pivoted to the platencarriage, the pull-wire f, joined to said lever e and to the finger-lever g', and the said finger-lever g', pivoted to the outer end of the lever f, that is secured to the platen carriage, all substantially as described.

4. In combination, the platen7 the platen- 

